Archived:CTelephony::DialNewCall() API gives connection error in dual mode (Known Issue)
Template:KBKI This known issue was originally created by Krugliy and has been verified by Nokia Developer.
After programmatically hanging up an outgoing call created by the user or by another application, (using, for example, CPhCltCommandHandler::Chup() or the Phone Client API), an attempt to create a new call may fail.
When the device is in a 3G network and a new call is established immediately after the previous call has been terminated, call creation may fail with the telephony application displaying a Disconnected note.
Note that this behavior has only been observed in 3G networks when using a device in 2/3G dual mode.
No known solutions for 3G (dual) network mode, however adding a delay between hangup and call creation increases the success rate. It has been also observed that new firmware versions do not have this problem anymore; for example, the issue cannot be reproduced with Nokia N95 sw v20.0.015.